mcauley



(No Model.)

J. G. MOAULEY.

FURNAGB. Y l No.'268,035. Patented Nov. 28,1882.

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TUNITED STATES PATENT OEETCE.

JOHN QMQAULEY, OE NEW YORK, N. Y.

VFURNAC'E.

SFECIFICATION formingpart of Letters Patent 1\To. 268,035, dated November 28, 1882.

Application filed October 22, 1881.

To all 'whom it may concern: l Be it known that 1, JOHN G. MOAULEY, of the city, county, and State of New York, have invented anew and useful Improvement in Furnaces; and I do hereby declare that the following is a full, clear, and exact description 'of the invention, reference being had to the accompanyin g drawings, forming a part of this specification. l

My invention relates to improvements in the construction of the combustion-chamber, bridge-Wall, and arches of furnaces designed to burn pulverized and other fuel; and it consists in constructing the bridge-wall, the arches in the combustion-chamber, and the arched Walls surrounding the boilerwith perforations through them, and also in the combination of the different parts, as hereinafter described.

Figure l is a longitudinal section and elevation of a boiler and furnace, showing the combustion-cham ber, the perforated walls, an d fuelpipe. Fig. 2 is a cross-section on a line with the bridge-Wall, showing the perforated arches in the combustion-chamber, and also the perforated Wall or arch around the boiler.

4The same letters represent the same parts in all the gures.

A, Fig. l, is the combustion-chamber.

B is the bridge-wall. This Wall extends to the top of the furnace-Wall, and is perforated from near the center of the combustion-chamber `to the top, as shown in Figs. 1 and 2.

G is a perforated arched wall in the top of combustion-chamber.

D D are doors in the front of the combus-` tion-chamber and ash-pit. These doors are used when ordinary coal fuel is used in the furnace;

E is a perforated archedwall in the combustion-chamber in place of the grate-bars.

F is an injector-tube, through which pulverized fuel and air are conveyed into the combustion-chamber ofthe furnace. Thisinjector has been described in my prior patent, dated October 25, 1881.

G is the ash-pit.

H is a perforated Wall, made the same as the upper part ofthe Wall B, and extends from the bottom to the top of the heat-chamber, and surrounding the boiler, thereby forcing the ame and products of combustion to pass through the perforations. The perforated walls may` (No model.)

be made to extend only partly around the boiler and produce a good effect.

l is a flue-boiler with the usual steam-chest, pipes, gages, and cocks, and is set in fire-brick or other fire-proof material, with the usual snpports at the ends.

J is the heat-chamber around the boiler.

J is a chamber back of the bridge-Wall B. Near the bottom of this chamber is a door, K. The Object of this door is so that any unconsumed material or ashes can be removed fromV the chamber, and also to admit air, if required, to aid the combustion of any unconsu'med fuel that may have passed through the perforations in the bridge-Wall B.

L is the furnace-Wall, surrounding and supporting the boiler, and it is constructed of firebrick or othe'` lire-proof material.

M is the smoke-pipe.

N N are the ues through the boiler.

O is a door similar to the door K, and can be used for the same purpose.

P is a door in the chamber, connected with the smokestack or pipe, and for the purpose of cleaning the dues in the boiler.

My improvements can be applied to nearly all the boilers now in use.

The perforated bridge and arched Walls are constructed by leaving out a certain number of bricks in the walls or bybricks made for the purpose with perforations through them. The

.perforated Wall E in the combustion-chamber Averized fuel,owingtotheintenseheat generated.

If ordinary fuel is used,it can be burned on the perforated arch, or grate-bars can be substituted foritwithoutfurther alteration in thefurnace. The advantages of the perforated walls are that they break up the smoothly-flowing current of dame into numerous jets, which are forced upward around, over, and under the boiler. It is evident from this subdivision of the iiame that the fullest value from the ame is obtained. An additional advantage is the arches or perforated Walls become highly heated, thus insuring a more complete combustion of the gases or any particles of unconsumed carbon'that may pass'jfrom the combustionchamber. Another aiftzantage is that Ordinary fuel ca-n be used irren y furnace.

IOO

I am aware that furnaces for burning pulverzed and other fuel have been made with arches under the boiler for the purpose of retarding and making the flame reverberate. This has only partly remedied the difficulty. My method of perforated arches and Walls dividing lthe flame into numerous jets effects a saving of fuel.

Having thus fully described my invention, what I desire to claim and secure by Letters Patent is- 1. The combination, with combustion-chamber A and boiler I, of perforated bridge-Wall B and perforated Wall H, the latter extending from the bottom to the top of the heat-chamber J, and both of said perforated Walls surrounding the boiler, substantially as and for the purpose set forth.

2. The combination of combustion-'chamber A, provided with injector-tube F, perforated arched wall C in the top of the combustionchamber, perforated hearth E, lperforated bridge-Wall B, boiler I, heat-chamber J, and chamber J', having door K, substantially as and for the purpose described.

3. The combination of the fuel and air pipe F with the combustion-chamber A, the perforated arched Walls C and E, and the perforated bridge-Wall B, substantially as described.

4. In a furnace and boiler, the combination of the following elements: the combustionchamber A, the perforated bridge-Wall B, the perforated arched Walls C and E, the pulverized fuel and air pipe F, the chamber J', the perforated Wall H, the furnace L, and the boiler xI, substantially as described.

JOHN G. MCAULEY.

Witnesses:

E. H. HART, L. T. GANFIELD. 

